"For example, I can't quote the research right now, but I've read that children of university professors make up about 10 times the percentage of G+T programs as their population numbers might suggest."
And it certainly isn't difficult to understand why that is. Do you know that some university professors take a different view in regards to their own children and education? In fact, I personally know several (and have read about others) who not only provide a stimulating environment in the home but began working with their children when they were quite young.
In addition, they supplemented regular schooling with educational material in the home that can be construed as much more advanced than what is offered in the local schools.
As a parent who child was nearly shut-out of the identification process, our home efforts resulted in early college enrollment and they are thriving. The kicker is that we are an african-american family.
The ultimate truth is that it's all about parenting. And as parents, we can't leave it up to someone else to determine our children's academic destiny.
It's just that simple.